RGEF400-2

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PTC Resettable Fuses (PRF) are an essential component in electrical systems. PRF help protect electrical components and circuits from damage due to short circuits and high-temperatures. They are used in a variety of applications including automotive, industrial, and consumer electronics. The RGEF400-2 is a popular PRF from Semtech Corporation used in a variety of applications.

The RGEF400-2 is a polymeric positive temperature coefficient (PPTC) resettable fuse designed for surface mount applications. It is made of an epoxy-encapsulated PTC thermistor element, which provides low resistance and fast response times. The fuse is rated for 400V operation and provides a hold current of 0.4A at a resistance of 170mΩ. The device can also operate in temperatures from -55°C to + 85°C.

The RGEF400-2 is designed for use in a variety of applications. It is commonly used in overcurrent protection circuits such as AC/DC adapters, solar inverters, and industrial motors. It can also be used to provide lightning protection in automotive infotainment systems and home automation systems. It is also used to prevent electrical interference in high-speed communication applications such as 10Gb and 40Gb Ethernet.

The working principle of the RGEF400-2 is simple. When the device is connected to a circuit, the current passing through it is limited to the programmed hold current- at the rated resistance. If an overcurrent event occurs, the thermistor will rapidly heat up, increasing the resistance and causing the current to drop. The increased resistance will create a temperature-dependent shut-off point which will remain until the circuit cools down. When the circuit and device cools down, the thermistor will return to its original resistance and the fuse will reset itself once the current is reduced.

The RGEF400-2 is an effective and reliable device for overcurrent protection. The device operates at fast response times and has a low hold current, allowing it to protect electrical components from damage due to short circuits and high-temperatures. It is used in a variety of applications and can be found in many electrical systems.

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